diff --git a/weed/command/s3.go b/weed/command/s3.go
index ee726fcec..679a4ae45 100644
--- a/weed/command/s3.go
+++ b/weed/command/s3.go
@@ -192,7 +192,7 @@ func (s3opt *S3Options) startS3Server() bool {
 	httpS := &http.Server{Handler: router}
 
 	listenAddress := fmt.Sprintf("%s:%d", *s3opt.bindIp, *s3opt.port)
-	s3ApiListener, err := util.NewListener(listenAddress, time.Duration(10)*time.Second)
+	s3ApiListener, err := util.NewListener(listenAddress, time.Duration(30)*time.Second)
 	if err != nil {
 		glog.Fatalf("S3 API Server listener on %s error: %v", listenAddress, err)
 	}
diff --git a/weed/s3api/s3api_object_handlers.go b/weed/s3api/s3api_object_handlers.go
index d78332395..b06f540fb 100644
--- a/weed/s3api/s3api_object_handlers.go
+++ b/weed/s3api/s3api_object_handlers.go
@@ -364,7 +364,9 @@ func passThroughResponse(proxyResponse *http.Response, w http.ResponseWriter) (s
 		statusCode = proxyResponse.StatusCode
 	}
 	w.WriteHeader(statusCode)
-	io.Copy(w, proxyResponse.Body)
+	if n, err := io.Copy(w, proxyResponse.Body); err != nil {
+		glog.V(1).Infof("passthrough response read %d bytes: %v", n, err)
+	}
 	return statusCode
 }
 
diff --git a/weed/util/http_util.go b/weed/util/http_util.go
index 7bd6758eb..34765d68e 100644
--- a/weed/util/http_util.go
+++ b/weed/util/http_util.go
@@ -392,11 +392,30 @@ func ReadUrlAsReaderCloser(fileUrl string, rangeHeader string) (io.ReadCloser, e
 }
 
 func CloseResponse(resp *http.Response) {
-	io.Copy(io.Discard, resp.Body)
+	reader := &CountingReader{reader: resp.Body}
+	io.Copy(io.Discard, reader)
 	resp.Body.Close()
+	if reader.BytesRead > 0 {
+		glog.V(1).Infof("response leftover %d bytes", reader.BytesRead)
+	}
 }
 
 func CloseRequest(req *http.Request) {
-	io.Copy(io.Discard, req.Body)
+	reader := &CountingReader{reader: req.Body}
+	io.Copy(io.Discard, reader)
 	req.Body.Close()
+	if reader.BytesRead > 0 {
+		glog.V(1).Infof("request leftover %d bytes", reader.BytesRead)
+	}
+}
+
+type CountingReader struct {
+	reader    io.Reader
+	BytesRead int
+}
+
+func (r *CountingReader) Read(p []byte) (n int, err error) {
+	n, err = r.reader.Read(p)
+	r.BytesRead += n
+	return n, err
 }